Impregnating composition and process for the production thereof



gas

iii 5% I ll. (.4 Li. as line;

SQIGURD i-ll'fillllfllnil; AI-l'l lhlmUiD, O33 AKSKEE, NEAllR GHRISTIANIA, ALND BERGER FJ'ELD IrIALVOEtSEN, (3F EY'HRHETEIAIJIA, NQl -FJW'AY, ASSIGN'ORS T0 'NORSK HYDHO-ELEK- TRISH KV'AELSTOE'AKTIESELSEKAZB. OF CHRISTI chills, NQRVIAY.

'uGNA-EIN E- UDMFWEKTIDN .Z-Eili'l) IPRQCESS F02?) THE PR-GDUCTIGN THEREOF.

This invention relates to me 1111 )rcgnation of materials and has or its object an H .atuig composi ion by means of which tight 1 arooi produc prodm. thoato great mm'ibcr oi 1mpreguamon substances have. been or employed for the purpose oi producing air tight and waterproof fabrics and other webs. is such substances the following may he mentioned: oils, fats, resin, iurliarubber, guttapercha, balata, viscose, glue, albumens, casein, HS'1l1i1ll3, bitumen, tar, etc. All of these impregnation substances are, however, connected with several disadvantagcs,jsome being very expensive, others being; brittle and others becoming; adhesive, even when subjected to a very slightly raised temperature or becoming brittle when slightly cooled.

According to the present invention it is possible to produce an impregnating c0mposition which is comparatively cheap, and which When applied to surfaces produces layers, which cannot be penetrated by air or Water. In addition. this composition is not connected with the drawbacks of known compositions above referred to.

The composition comprises sulfurizecl tar, pitch or lilzs heavy tar products mixed. with :Zurizcd nonineral oils as vegetable or animal oils with. or Without the addition of other The composition is suitahiy produced by sulfurizing; each of the components zely and then mixing th products and hear-mg mixture until the Specification of Letters Patent.

Nor.

licction file. October 13, 1920. Serial No. 416,755.

reaction is completed and a suitable consistency has been attained.

Example i.

200 kg. of rape seed oil and 40 kg. of sulfur were heated While being stirred, until the mass attains such a degree of viscid ity, that it can be drawn into threads when cooled. Atthis stage of heating 300 kg. of prepared tar, which has been previously sulfurizcd with 51 kg. of sulfur is added While the mass is constantly stirred. The sulfurizingr of oil and tar may also take place simultaneously, but the time required to complete the reaction will then be much longer, and it is diliicult to control the reaction Instead of rape seed oil and similar oils, animal oils. such as whale. oil or fish oils may be utilized. Thus the shark oil {oil of somnz'ols us microceplzaius) has been found to be especially advantageous and may be used in the following manner:

Example 11.

150 kg. of the oil (of som-aiosus microccpb ((M8) is heated and mixed with 60 kg. of sulfur, while stirring the mixture. The mass in maintained in a heated condition, until a sample by cooling becomes tough. At this stage 200 kg. of tar which has previously been sulfurizcd With 40 kg. of sulfur is added. The mass is heated, until a sample when cooled is not of a sticky charactor.

The composition may also he prepared by the use or a mixture of. animal and vege-.

N orge-salpeter (nitrate of lime) can readily 'be packed and stored for a longer period of time in bags impregnated with the de scribed impregnating composition.

laims:-

1. The process of producing an impregnating material which consists in sulfurizing heavy tar products, separately sulfurizing non-mineral oils, mixing the separately 'sulfurized resultant compounds, and heating the znlxture until the reaction is completed and the desired consistency obtained.

2. The process of producing an impregnating'material which consists in sulfurizing heavy tar products, separately sulfurizing fatty oils, mixing the separately sulfurized resultant compounds, and heating the mizn 

